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Sample F-74
NavDat sample number 5191 · ANDESITE
Sample
| Sample ID | F-74 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | dark grey to black trachyandesites |
|---|
Location
| Latitude | 38.2918 |
|---|
| Longitude | -119.369 |
|---|
| Location | Little Walker Center |
|---|
| State / province | California |
|---|
| Location comment | erupted around the margin and onto the floor of the caldera |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 9.65 |
|
8.6 |
10.7 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 55.83 | | WT% | XRF |
| TIO2 | 1 | | WT% | XRF |
| AL2O3 | 17.74 | | WT% | XRF |
| FE2O3 | 7.44 | | WT% | XRF |
| FEO | 6.7 | | WT% | XRF |
| MNO | 0.13 | | WT% | XRF |
| MGO | 3.72 | | WT% | XRF |
| CAO | 7.52 | | WT% | XRF |
| NA2O | 2.79 | | WT% | XRF |
| K2O | 2.66 | | WT% | XRF |
| P2O5 | 0.38 | | WT% | XRF |
| LOI | 1.44 | | WT% | XRF |
| TOTAL | 99.21 | | WT% | XRF |
| RB | 69.7 | | PPM | XRF |
| SR | 1179 | | PPM | XRF |
